<template>
  <div class="roles">
    <!-- 面包屑导航 -->
    <el-breadcrumb separator-class="el-icon-arrow-right">
      <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
      <el-breadcrumb-item>权限管理</el-breadcrumb-item>
      <el-breadcrumb-item>用户列表</el-breadcrumb-item>
    </el-breadcrumb>

    <!-- 卡片区域 -->
    <el-card>
      <!-- 添加角色按钮 -->
      <el-row>
        <el-col>
          <el-button type="primary">添加角色</el-button>
        </el-col>
      </el-row>
      <!-- 角色列表 -->
      <el-table :data="roleslist" border stripe>
        <el-table-column type="expand">
          <template slot-scope="scope">
            <el-row :class="['bdbottom', i1 === 0 ? 'bdtop' : '', 'vcenter']" v-for="(item1, i1) in scope.row.children" :key="item1.id">
              <!-- 一级权限 -->
              <el-col :span="5">
                <el-tag closable @close="removeRightById(scope.row, item1.id)">{{ item1.authName }}</el-tag>
                <i class="el-icon-caret-right"></i>
              </el-col>
              <!-- 二级和三级权限 -->
              <el-col :span="19">
                <el-row :class="[i2 === 0 ? '' : 'bdtop', 'vcenter']" v-for="(item2, i2) in item1.children" :key="item2.id">
                  <!-- 二级权限 -->
                  <el-col :span="6">
                    <el-tag type="success" closable @close="removeRightById(scope.row, item2.id)">{{ item2.authName }}</el-tag>
                    <i class="el-icon-caret-right"></i>
                  </el-col>
                  <el-col :span="18">
                    <el-tag
                      type="warning"
                      closable
                      v-for="item3 in item2.children"
                      :key=item3.id
                      @close="removeRightById(scope.row, item3.id)"
                    >{{ item3.authName }}</el-tag>
                  </el-col>
                </el-row>
              </el-col>
            </el-row>
          </template>
        </el-table-column>
        <el-table-column type="index" label="#"></el-table-column>
        <el-table-column label="角色名称" prop="roleName"></el-table-column>
        <el-table-column label="角色描述" prop="roleDesc"></el-table-column>
        <el-table-column label="操作" width="300px">
          <template slot-scope="scope">
            <el-button size="mini" type="primary" icon="el-icon-edit"
              >编辑</el-button
            >
            <el-button size="mini" type="danger" icon="el-icon-delete"
              >删除</el-button
            >
            <el-button size="mini" type="warning" icon="el-icon-setting"
              @click="showSetRightDialog(scope.row)">分配权限</el-button
            >
          </template>
        </el-table-column>
      </el-table>
    </el-card>

    <!-- 分配权限对话框 -->
    <el-dialog
      title="分配权限"
      :visible.sync="setRightDialogVisible"
      width="50%" @close="setRightDialogClosed">
      <el-tree
        :data="rightslist"
        :props="treeProps"
        show-checkbox
        node-key="id"
        :default-checked-keys="defKeys"
        ref="treeRef"
        default-expand-all></el-tree>
      <span slot="footer" class="dialog-footer">
        <el-button @click="setRightDialogVisible = false">取 消</el-button>
        <el-button type="primary" @click="allotRights">确 定</el-button>
      </span>
    </el-dialog>
  </div>
</template>

<script>
export default {
  name: 'roles',
  data() {
    return {
      roleslist: [],
      setRightDialogVisible: false, // 分配权限对话框显示隐藏
      rightslist: [],
      treeProps: {
        children: 'children',
        label: 'authName',
      }, // 渲染规则
      defKeys: [], // 默认勾选的权限
      roleId: '', // 当前分配权限项的id
    }
  },
  created() {
    this.getRolesList()
  },
  methods: {
    // 获取roles列表
    async getRolesList() {
      const { data } = await this.$http.get('roles')
      if (data.meta.status === 200) {
        this.roleslist = data.data
      }
    },
    // 删除tag选项
    async removeRightById(role, rightId) {
      const confirmRes = await this.$confirm('此操作将永久删除该用户, 是否继续?', '提示', {
        confirmButtonText: '确定',
        cancelButtonText: '取消',
        type: 'warning',
      }).catch(err => err)

      // 点确认为 confirm， 点取消为 cancel
      if (confirmRes === 'confirm') {
        // console.log(confirmRes)
        const { data } = await this.$http.delete(`roles/${role.id}/rights/${rightId}`)
        if (data.meta.status === 200) {
          this.$message.success('删除成功')
          // this.getRolesList()
          role.children = data.data
        }
      }
    },
    // 显示分配权限对话框
    async showSetRightDialog(role) {
      this.roleId = role.id
      const { data } = await this.$http.get('rights/tree')
      if (data.meta.status === 200) {
        this.rightslist = data.data
      }
      this.getLeafKeys(role, this.defKeys)
      this.setRightDialogVisible = true
    },
    // 通过递归拿到勾选的id
    getLeafKeys(node, arr) {
      if (!node.children) {
        return arr.push(node.id)
      }
      node.children.forEach(item => {
        return this.getLeafKeys(item, arr)
      })
    },
    // 清空权限勾选状态
    setRightDialogClosed() {
      this.defKeys = []
    },
    // 点击确定分配权限
    async allotRights() {
      const keys = [
        ...this.$refs.treeRef.getCheckedKeys(),
        ...this.$refs.treeRef.getHalfCheckedKeys(),
      ]
      const keyStr = keys.join(',')
      const { data } = await this.$http.post(`roles/${this.roleId}/rights`, { rids: keyStr })
      if (data.meta.status === 200) {
        this.$message.success('权限分配成功')
      }
      this.getRolesList()
      this.setRightDialogVisible = false
    },
  },
}
</script>

<style lang="less" scoped>
.el-tag{
  margin: 7px;
}
.bdtop {
  border-top: 1px solid #eee;
}
.bdbottom {
  border-bottom: 1px solid #eee;
}
.vcenter{
  display: flex;
  align-items: center;
}
</style>
